Button sewing machine



Sept. 27, 1938.

,1. H. PIKUL' BUTTON SEWING MACHINE Filed Feb. 19, 1936 12 Sheets-She et 1 INVENi'ElR: 34. M.

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BUTTON SEWING MACHINE Filed Feb. 19, less 12 SheetsSheet 2 VINVENHJRQ h w b pakif V v (imma- Sept. 27, 1938. H KU 2,131,387

BUTTON SEWING MACHINE Filed Feb. 19, 1956 .12 Sheds-Sheet s INVEN+DRI I Q h QQQMM-QM V I mysQ Sgpt. 27, 1938.

J. H. PIKUL BUTTON SEWING MACHINE Filed Feb. 19, 1936 l2 Sheets-Sheet 4 Fig B i l VAL INVEN+DRI Sept. 27, 1938. E "2,131,387

BUTTON SEWING MACHINE Filed Feb. 19, 1936 12 Sheets-She'et 5 IINVIEN'FEIRF 1U 64PM .E, 'J-.1M

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BUTTON SEWING MACHINE Filed Feb. 19, 1936 12 Sheets-Shae? 6 I MQ'LQ l'iy Sept. 27, 1938; .1. H. Pmu I BUTTON SEWING MACHINE Filed Feb. is, 1936 12 Sheets-Sheet 7 I p 1933- J. H. PIKUL BUTTON SEWING MACHINE Filed Feb. 19, 193 6 12 Sheets-Sheet B lNvl m-i-maz PM. 5 ACH- s Sept. 27, 1938. J K 2,131,387

BUTTON SEWING MACHINE Filed Feb. 19. 1936 l2 Sheets-Sheet ,9

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BUTTON SEWING MACHINE Filed Feb. 19, 1936 12 Sheets-Sheet 11 I 'IIIIIIIIIK v "IIIIIII.

Sept 27, 1938., J. H, PIKUL 2,131,387

BUTTON SEWING MACHINE Filed Feb. 19, 1936 12 Sheets-Sheet l2 T HSQ out! k I 3 7 @528 KW Patented Sept. 27, 1938 PATENT OFFICE- BUTTON SEWING MACHINE Joseph H. Pikul, Boston, Mass., assignor to The Reece Button Hole Machine Company, Boston, Mass, a corporation of Maine Application February 19, 1936, Serial No. 64,693

15 Claims.

This invention relates to machines for sewing on buttons, especially substantially fiat buttons having one or more pairs of perforations or holes through which the attaching thread is passed.

The invention has for its general object to provide improved stitch-forming mechanism suitable for use in machines of this type and capable of forming a group or predetermined number of attaching stitches alternately through two holes of 10 a pair and thereafter completing the operation by the formation of a tying stitch whereby the attaching stitches are secured against unraveling. The more particular objects of the invention, together with means whereby the latter may be 15 carried into effect, will best be understood from the following description of an illustrative embodiment thereof shown in the accompanying drawings, the particular mechanism described and shown having, however, been chosen for pur- 20 poses of exemplification merely, as it will be obvious to'those skilled in the art that the invention, as defined by the claims hereunto appended, may be otherwise embodied without departure from the spirit and scope thereof.

In said drawings:

Fig. 1 is a side elevation, partly broken away, of the complete machine.

Figs. 2 and 3 are detail views illustrating the attachment of two different types of buttons.

30 Fig. 4 is a horizontal section taken substantially on the line 6-4, Fig. 1.

Fig. 5 is a detail section on the line 55, Fig. 1. Fig. 6 is a horizontal section taken substantially on the line 6-45, Fig. 1.

Fig. 7 is a detail section taken substantially on the line 'l-l, Fig. 1.

2 Fig. 8 is a front elevation, partly broken away, of the complete machine.

Fig. 9 is a vertical section taken substantially 46 on the line 99, Fig. 1.

Fig. 10 is a detail section taken substantially on the line llli, Fig. 1.

Fig. 11 is a plan view. and

Fig. 12 a side elevation of the maincam.

Figs. 13 and 14 are sections on the lines l3-l3 and i l-l4, respectively, Fig. 12.

Fig. 15 is a detail view of a portion of the adjusting mechanism for controlling the amplitude of the lateral movements of the stitch-forming 50 instrumentalities in accordance with the spacing of the holes in the button.

Fig. 16 is a detail perspective view of the lower needle bar guide carrier through which thehori- 55 controlled,

Fig. 17 is a fragmentary plan view, partly in section, of the mechanism for moving the needle horizontally.

Fig. 18 is a detail perspective view of certain of the elements of the mechanism shown in Fig. 1'7.

Fig. 19 is a fragmentary detail view, partly in side elevation and partly in section, of the mechanism for controlling the looper mechanism in the formation of the tying stitches.

Fig. 20 is a view of the same mechanism looking from the left in Fig. 19.

Fig. 21 is a detail section taken substantially on the line ill-2|, Fig. 20.

Fig. 22 is a detail fragmentary plan view, partly in section, of the parts shown in Fig. 19. Figs. 23 to 28 are detail views, partly in section and partly in front elevation, of the stitch-forming mechanism, illustrating the operation during the attaching-stitch-forming cycle.

Figs. 29 and 30 are sections taken on the lines 29-29, Fig. 24 and 30-30, Fig. 25, respectively.

Figs. 31 to 36 are views in front elevation, similar to Figs. 23 to 28, respectively, illustrating the operation of the stitch-forming mechanism during the tying-stitch-forming cycle.

Figs. 37 and 38 are horizontal sectional views taken substantially on the lines 3'l-3'|, Fig. 32, and 3838, Fig. 34, respectively.

Fig. 39 is a detail view of the combined loop deflector and thread breaker.

Figs. 40 to 44 are diagrammatic perspective views illustrating the several steps in the formation of the tying stitch.

For convenience the invention is herein shown as applied to a button sewing machine of the character shown and described in application, Serial No. 60,616, filed January 24, 1936, by Franklin A. Reece, in which machine all of the movements necessary to attach either a two-hole or a four-hole button are imparted to the stitchforming instrumentalities, as distinguished from the work holding instrumentalities.

Referring to Figs. 1, 4, 6, 8 and 9, the frame or casing of the machine comprises a base or bed and an overhanging head H supported therefrom by an upright housing portion 12 enclosing the principal parts of the operating and control-- ling devices. For convenience of assembly and repair said frame or casing comprises two separable main sections A andAZ and several attached minor parts all of which collectively afford the necessary enclosures, supports, bearings, etc., for the various moving parts.

The bed 10 carries a work plate 13 upon which the fabric W to which the buttons are to be attached is supported and against which it s clamped by a presser foot 14 carrying a button clamp 15 for holding the individual buttons and positioning them for the'operation of the sewing instrumentalities.

The main driving and controlling instrumentalities include a main power shaft I6 journalled in suitable bearings in the head II and to which P wer may be applied through a belt pulley 'II under the control of automatic stop mechanism hereinafter referred to, a vertical cam shaft I8 journalled'in suitable bearings in the housing 12,

driven through a Worm 25 and worm gear 26 from the main shaft I6, and provided with suitable cams for controlling the movements of the several instrumentalities; and a horizontal looper shaft I9 journalled in suitable bearings in the base I0 and operated and controlled from the cam shaft I8.

The stitch-forming instrumentalities include an eye-pointed needle carried by a needle bar 8I mounted for vertical or longitudinal reciprocation in the head 'II and a pair of loopers 82 and 83 on a looper carrier 84 secured to the looper shaft 19 adjacent its forward end. The sewing thread if is supplied to the needle as from a suitable source, not shown, through a tension device 85 and suitably arranged guides on the head and needle bar and shown, for example, at 86 and 81, under the control of the usual take-up 88 which,

in this instance, is operated by a cam 89 upon the shaft I6.

The needle bar 8| is longitudinally reciprocated by a crank pin 90 carried by the cam 89.

and connected by suitable linkage 9I with a collar 92 on said needle bar, and is guided adjacent its upper end in a bearing 93 which, as shown, is carried by a flexible metallic disk 94 suitably clamped in a recess 95 in the upper end of the head II. This mounting of the needle bar guide 93 may be, and as shown is, substantially as more fully shown and described in the Reece Patent No. 1,993,350, March 5, 1935, and is such as to permit the needlebar a limited universal swinging movement about the point of intersection of its axis with the plane of the disk 94. Adjacent its lower end the needle bar is guided in a bearing 96 similarly mounted by means of a disk 91 in a carrier member 98 mounted, as hereinafter described, for movement in a horizontal Diane both laterally and longitudinally of the machine frame.

In attaching a two-hole button B, as shown in E. 2, the carrier 98 is oscillated laterally between successive descents of the needle 80 to cause said needle to pass alternately through the holes h and h in the button, the looper carrier being at this time oscillated laterally by the shaft 19 to cause the loopers to cooperate with the needle, as hereinafter more fully explained, in the formation of stitches s passing through said holes and serving to attach the button to the fabric W. In attaching a four-hole button, such as shown at B in Fig. 3, the same operations are performed to form a series of attaching stitches s passing through the holes h and h after which the carrier 98 is shifted longitudinally, or in a direction fore and aft of themachine, to bring the needle into the plane of the holes h and h of the other pair, the looper shaft I9 with the looper carrier 84 and loopers 82 and 83 being similarly shifted to maintain the cooperative relationship of said loopers with the needle. Thereafter the sewing operations are repeated to the latter.

form a second set of attaching stitches s passing through the holes h and h.

Specifically the Dresser foot I4 and button clamp 15 carried thereby form no portion of the present invention and may be of any construction and arrangement suitable to perform their intended functions and permit the operation of the stitch-forming instrumentalities as above described. As shown, the presser foot I4 is secured to a short upright rod I00 (see Figs. 1, '7 and 8) carried by an arm IOI projecting from a slide- I02 guided for vertical movement in the head II. The slide I02 is normally held downward to urge the presser foot against the work by a spring I03 but may be moved upwardly against the tension of said spring, to raise the presser foot, by a lever I04 connected by a chain I05 with a suitable treadle, not shown.

The carrier member 98 for the lower needle bar guide '96 is guided for longitudinal movement in a groove in the top of a head I06 (Figs. 1, 4, 16 and 17) having a shank or trunnion I01 received in a socket I08 in the bottom wall of the head II of the machine,.whereby said head I06 is pivoted for oscillation about the axis of said shank. Said carrier is, therefore, free to move longitudinally in the head I06 or to oscillate laterally with said head about the pivotal axis of Said carrier is further held and guided for movement in a horizontal plane by channel members I09 (Figs. 1 and 10) each secured to bosses H0 on the bottom wall of the head II by bolts I II (see also Fig. 4) said carrier being retained within the groove of said channel by a cover plate H2 secured in place by said bolts III.

The carrier 98 is oscillated laterally about the axis of the pivot I01 to cause the needle to pass alternately through the holes h, h. (Fig. 2), h, h (Fig. 3) or h it, by mechanism most clearly shown in Fig. 1'7. Said mechanism comprises a link H3 having a pin or stud I I4 (see also Fig. 9) a downwardly projecting portion of which is received in a longitudinally disposed way H5 (Fig. 16) in the upper face of'the carrier 98, and an upwardly projecting portion of which is received in a way H6 in a head H'I having a shank H8 pivoted in a bracket I I9 in the head 'H. The way HG permits lateral movement of the stud H4, and consequently lateral oscillation of the carrier, while holding said stud ag'ainst longitudinal movement in the way H5; while the latter way permits longitudinal movement of the carrier 98 independently of said stud as hereinafter explained. The opposite end of the link H3 is provided with a stud I 20 received in an arcuate groove I2I in one arm of a lever I22 (see Figs. 4

and 9) secured to an upright shaft I23 journalled in a bearing I24 depending fromthe top of the Theamplitude of the lateral vibration thus imparted to the carrier 98 will depend upon the point of engagement of the stud I20 with the groove I2 I, and in order to permit this to be readily adjusted in accordance with the lateral spacing of the holes in the button, the link H3 is provided with a third stud I30 engaged by a fork 75 I3I (see also Figs. 4, 5, 9 and 15) carried by a slide I32 guided for horizontal movement on the side wall of the head 1| by a stud I33 projecting inwardly from said wall and engaging a slot I34 in the slide and a clamp screw I35 projecting through a slot I36 in the wall and in threaded engagement with said slide. By loosening the clamp screw the slide I32 may be moved longitudinally, and by tightening said clamp screw it may be secured in adjusted position.

The mechanism for moving the carrier 98 longitudinally is likewise shown in Fig. 17 and comprises a link I46 having at its forward end a stud I41 received in a transverse groove or way I48 in the upper face of the carrier 98 adjacent its rear end. This construction permits the carrier to be swung laterally by the link II3, as above described, independently of the link I46 and stud I41. The stud I41 also pivotally connects the link I46 with an arm I49 on a vertical rock shaft I50 journaled in suitable bearingson the interior of the main casing, said connection serving to retain the stud I41 in the groove I48. At its rear end the link I46 carries a stud II which engages a groove I52 in an arm I53 secured to a second vertical rock shaft I54. Adjacent its lower end the rock shaft I54 has secured thereto an arm I55 having a bifurcated end between the branches of which is pivoted the end of a link I56 having a slot I51 (Fig. 18) to receive a stud I58 (Fig. 17) depending from a bracket or interior frame member I59 within the main casing and the form of which is most clearly shown in Fig. 9. The link I56 is, therefore, guided on the stud I58 by engagement of the latter with the slot I51 and is supported by a flange or head I60 (Fig. 9) on the lower end of the stud. The link I56 has secured thereto a pair of contact or cam-follower blocks I6I embracing between them and cooperating with an edge cam I62 rotatably mounted on the stud I58 and the hub of which is provided with a spur gear I63 meshing with a pinion I64 on the lower end of the main cam shaft 18. The gear I63 and pinion I64 are of such sizes as to constitute two to one gearing between the cam I62 and the cam shaft 18, so that the cam I62 is rotated at one half the speed of the main cam I29. Accordingly, after one complete rotation of the cam I29 to cause the cam groove I21 thereof to produce a predetermined number of lateral reciprocations of the needle bar to form, for example, the group of stitches s (Fig. 3), the cam I62 will cause the carrier 98 and needle bar to be shifted longitudinally of the machine in one direction, after. which a second rotation of the cam I29 will cause the necessary number of lateral reciprocations to form the group of stitches s whereupon the cam I62 will return the carrier and needle bar to their original longitudinal positions. The amplitude of the longitudinal or fore and aft movement of the carrier 98 and needle bar 8I is determined by the position of the stud I5I in the groove I52 of the arm I 53, and means are preferably provided whereby this may be conveniently adjusted in accordance with the fore and aft spacing of the holes 11. h and h 71:. Such means, however, form no portionof the present invention and therefore need not 'be described in detail herein.

The looper shaft 19 is slidably mounted at its rear end in a sleeve I19 (see Fig. 6) rotatably mounted in a suitable bearing in the frame member I59. Adjacent the forward end of the sleeve I19 the shaft 19 has secured thereto a collar I80, and the contiguous ends of said sleeve and collar are suitably formed to constitute the complementary elements of a. slip coupling or clutch connecting the sleeve and shaft for oscillation in unison while permitting longitudinal movement of the shaft relative to the sleeve. At its rear end the sleeve I19 is formed with a head I8I (Figs.

6 and 19) having a transverse bore in which a stud I83 (Figs. 1 and 19) is rotatably and slidably mounted. The stud I83 is provided with a head I84 having a transverse bore in which is slidably and rotatably received a stud I85 projecting longitudinally from the end of an arm I86 secured to one end of a transverse rock shaft I81 journalled in a suitable bearing in the frame member I59. By this construction the shaft I81 and sleeve I19, although disposed perpendicular to one another, are connected for oscillation in unison. At its opposite end the rock shaft I81 has secured thereto a bifurcated arm I88 between the bifurcations of which is pivoted at I89 the lower end of a link I90. The upper end of the link I90 is provided with a transverse stud I9I the inwardly projecting end of which is received in an arcuate groove I92 in one end of a lever I93 fulcrumed at its opposite end on a stud I94 projecting inwardly from the side wall of the housing 12. Intermediate its ends the lever I93 carries a pin I95 which engages a cam groove I91 formed in the side or periphery of the main cam I29. The

groove I91 corresponds to the groove I21, that is to say, the number and timing of the oscillations of the looper shaft 19 produced by the former correspond to the number and timing of the lateral oscillations of the needle produced by the latter. Accordingly, the oscillations of the loopers are synchronized with the lateral oscillatons of the needle, and it is obvious that the amplitude of the former must vary with the amplitude of the latter. The amplitude of oscillation of the looper shaft 19 depends upon the position of the stud I9I in the groove I92 of the lever I93, and in order that this position may be suitably adjusted concurrently with the adjustment of the position of the stud I20 in the groove I2I of the lever I22 the slide I32 (Fig. by which the latter stud is adjusted is provided with a depending flange 202 having a slot 203 to receive the outwardly projecting end of the pin I9I (see also Fig. 1). Consequently, when the slide I32 is adjusted in accordance with the lateral spacing of the holes in the button, the studs I and I9I will be simultaneously adjusted to control both the lateral throw of the needle and the amplitude of vibration of the loopers, thereby maintaining the proper relation between the movements of said parts.

When the needle bar carrier 98 is shifted longitudinally, or in a direction fore and aft of the machine, in sewing a four-hole button, in order to transfer the operation of the needle from the plane of one pair of holes, for example, the holes h h to the plane of another pair, for example,

the holes 11 h, the looper shaft 19 must be like wise shifted longitudinally to maintain the proper cooperative relationship of the loopers to the needle, and to this end, in the construction shown,

the following means are provided, reference being had to Figs. 1, 6 and 9. The vertical rock shaft I50, whose arm I49 is connected with the link I46 by the stud I41, has secured to its lower end a second arm 204 connected by a link 205 with a fork 206 through openings in the arms of which the looper shaft 19 extends, and whose arms embrace a collar 201 secured to said looper shaft, whereby, when the carrier 98 is shifted longitudinally by the lever I53 acting through the link I46, the shaft 19 will be correspondingly shifted 1ongitudinally. It will be noted that the length of the arm 204 is greater than that of the arm I49 to compensate for the difference in distance, from the pivotal center ofthe needle bar guide 93, of the shaft 19 and needle bar carrier 98, respectively.

Asabcve stated, the main cam I29 makes one complete rotation for each group of stitches s, s or 8 and the number of stitches of each-group depends upon the shape of the cam grooves I21 and I91. Referring to Fig. 11, the cam groove I21 is formed with five radially offset portions, adapted to produce five complete lateral reciprocations of the needle, in synchronism with the vertical reciprocations thereof, and with a concentric portion 23I during which the needle is caused to make two descents through the same hole in the button in order to form a knot or tying stitch, as hereinafter further explained, it being understood that the groove I191 is correspondingly formed to produce the requisite cooperative oscillatory movements of the looper. Consequently, each group of stitches will comprise ten attaching stitches and a tying stitch, the whole group requiring twelve vertical reciprocations of the needle.

The belt pulley 11 (Fig. 1) is loose on the shaft 18 and is adapted to be clutched thereto by a combined clutch and stop mechanism which may be substantially similar to those shown and described in the patents to Mello, No. 1,227,643, May 29, 1917, and Reece, No. 1,730,014, October 1, 1929. As more fully explained in application Serial No. 60,616, above referred to, this mechanism is operated by a stud 3llI (Figs. 11' to 14). on

the main cam I29 through connections adjustable to cause stopping of the machine after one complete rotation of said cam, as in sewing one group of stitches through the holes of a two hole button, or after more than one such rotation, as in sewing groups of stitches through the pairs of holes of a four hole button, or in sewing a plurality of groups through the same pair of holes of a two hole button. These connections constitute no portion of the present invention and therefore do not require description in detail herein.

Referring particularly to Figs. 23 to 30, the loopers 82 and 83 are formed with thread engaging shoulders z and are secured in fixed posiplane therewith, as shown in Fig. 29, by means of torsion springs 226 interposed between said carrier and tail portions 230 of said loop spreaders,

v the positions of said loop spreaders under the influence of said springs being determined by angularly adjustable stops 221.. Said loop spreaders are moved out of the latter positions to spread the thread loops bymeans of a cam plate 228 which, during the attaching-.stitch-forming cycle, is held stationary, as hereinafter more fully- The operation of the above mechanism in the formation of the attaching stitches s is illustrated, in the case of.a two-hole button B, in Figs. 23 to 30. As above explained the needle 80 is vibrated laterally between successive descents, causing the sameto pass alternately through the holes 71. and h in the button, by the cam groove I21 in the cam I29, the looper shaft 19 and looper carrier 84 being oscillated in synchronism with the operations of the needle by the cam groove I91. At the beginning of the attaching operation, the needle descends through one of said holes, for example the hole It shown at the left in Fig. 23 and through the work W, the looper carrier at this time moving toward the right from its extreme position toward the left. The

be caught by the shoulder z of the looper 82 and 'carried into a position below the hole h During this movement the tail 230 of the loop spreader 223 engages the left bevelled edge 229 of the cam plate 228, causing said spreader to be rocked about its pivot 225 and carrying its end away from the looper 82, thereby spreading said loop, as shown in Fig. 30. The needle 80 is then moved laterally toward the right and again descends, this time passing through the holes h, and in its descent passes through the spread loop I, the looper carrier simultaneously moving toward the left to release said loop which is accordingly cast about the needle as shown in Fig. 26, and drawn up to the work by the takeup 88. The needle then rises, leaving behind it a second loop I which, as the looper carrier 84 continues its movement toward the left, is immediately entered by the looper 83 and loop spreader 224, in a manner similar to the engagement of the loop I by the looper 82 and spreader 223 as above explained. Continued movement of the looper carrier into its extreme position toward the left causes the loop Z to be spread by the spreader 224 and caught by the shoulder z of the looper 83 so as to be carried into and held in a position for the needle 80 to pass therethrough during its next descent through the hole thereby completing the first stitch. These operations are continued to form a group of attaching stitches s of a number deiigrmin1 ed by the shape of the cam grooves I21 and At the completion of the group of attaching stitches, the needle is caused to descend twice through the same hole in thebutton, due to the concentric portion 23I of the groove I21, during which the looper mechanism, together with certain associated parts about to be described, operate in such a manner as to form a tying stitch or knot which will prevent unraveling of the attaching stitches.

Referring to Figs. 19 to 22, and particularly to Fig. 21, the cam plate 228 is secured, as by riveting, to a hub 232 mounted to turn on a reduced end portion 233 of the looper shaft 19, while the looper carrier 84 has a hub portion 234 secured, as bypins 235, to said reduced portion. The cam plate 228, while free to turn on the shaft, is held against movement longitudinally thereof, in one direction by engagement of said cam plate with the looper carrier. 84, and in the opposite direction by engagement of the end of the hub 232 with a shoulder 236 at the end of the reduced portion 233. Mounted to turn on the hub 234 of the looper carrier is a loop deflector carrier 231 which is retained on the shaft by a nut 238 and is positioned longitudinally of the shaft between said nut and a spacer sleeve 239 interposed between the same and the body of the looper carrier 84. The cam plate 228 and loop deflector carrier 231 are connected with one another, for turning movement in unison about the axis of the looper shaft, by a pin 240. The pin 240 has a reduced end portion 24I which is received in a slot 242 (Fig. in the loop deflector carrier 231, whereby the relative angular positions of said carrier and the cam plate 228 can be adjusted if necessary, said parts being secured in adjusted position by a nut 243 applied to the threaded end of said reduced portion.

The pin 248 is connected by a link 244 with a pin 245 carried between the ends of a pair of arms 246 (Fig. 19) projecting from a hub- 241 secured, as by a pin 248, to a shaft 249 suitably journaled in the frame and extending parallel to the looper shaft 19. The spacing of the arms 248 relative to the width of the link 244 is suflicient to permit the above described longitudinal movement of the looper shaft and the parts carried thereon without corresponding movement of the shaft 249. The shaft 249 is provided adjacent its inner end with a skew gear 258 which meshes with a skew gear I on the lower end of an upright shaft 252 suitably journaled in the frame and having secured to its upper end, as by a pin 253, a head 254. The head 254 carries a pin 255 which engages a groove 251 formed in the bottom of the main cam I29.

Secured to the carrier 231 is the shank 251 (see particularly Fig. 39) of a combined loop deflector and thread breaker 268, saidshank being of such a shape that, as said carrier is oscillated about the axis of the looper shaft 19, the loop deflector 288 will move in an arcuate path immediately over the loopers and loop spreaders. Said loop deflector is provided at its free end with a needle receiving slot 289 and at the opposite sides of said slot with longitudinal projections terminating in oppositely bevelled end surfaces 218. One of said projections is further provided with a longitudinal extension terminating in a hook 21I.

The cam groove 251 (Fig. 13) is for the most part concentric but includes an operative portion 212 so arranged as to be engaged by the pin 255 when the pin I25 is in the concentric portion 23I of the groove I21. The form of the cam groove portion 212 is such as to cause an oscillation of the cam plate 228 and loop deflector carrier 231 in the manner hereinafter described. The cam groove I91 is formed with a portion 213 offset in. the same manner as the portions producing the attaching-stitch-forming oscillations of the looper, but to a less extent, so that the movement produced thereby is of less amplitude, and said cam portion includes two stages 214 and 215, the former offset to a greater extent than the latter. The arrangement is such that the pin I95 engages the cam groove portion 213 when the pin I25 is in the concentric portion 23I of the groove I21 and when the pin 255 is in the operative portion 212 of the cam groove 251.

The operation of the parts in the formation of the tying stitch is illustrated in Figs. 31 to 38 and 40 to 44. After the formation of the last loop of the group of attaching stitches, for exsubstantially like those taking place in the for-.

ample, the loop I formed by the descent of the needle through the hole h the needle again descends through the other hole, for example the hole h shown at the left in Fig. 31, and thereafter rises, leaving behind it a loop Z as shown in Fig. 5 32. Simultaneously the looper carrier moves toward the right, causing the looper 82 and loop speader 223 to enter said loop as shown in Figs. 32, 33, 37 and 40, the operations thus far being l0 mation of the attaching stitches as shown in Figs. 24, 25 and 29 except that the movement of the looper and loop spreader, caused by the cam groove portion 214, is of less amplitude, being only suflicient to carry the loop slightly beyond the center line between holes 12. and h. This movement is insuflicient to cause the tail portion 230 of the loop spreader 223 to be operated by the left bevelled edge 229 of the cam plate 228 to a sufficient extent to cause said loop spreader to spread the loop were said cam plate to remain stationary. However, at this time the operative portion 212 of the cam groove 251 causes said cam plate, together with the carrier 23,1 and loop deflector 268, to be turned in a counter-clockwise direction or toward the left as shown in, Figs. 33 and 34. This movement of the cam plate causes the spreader 223 to be operated to spread the loop 1 which is caught by the bevelled ends 210 of the deflector 268 and carried to the left therewith, the looper 82 and spreader 223 continuing to recede or move. toward the left during this operation until the parts reach the position shown in Figs. 34, 38 and 41. The needle thereupon again descends through the same hole h, through the loop I' which is thus held open and in a position to receive it, and through the slot 289 in the loop deflector 288. The movement of the looper 82 and spreader 223 towardthe left continues, causing them to release the loop I which is thus cast about the needle and drawn up against the work by the takeup, as shown in Figs. 35 and 42. The needle then rises, leaving behind it a loop l as shown in said last named figures, whereupon, as the needle continues to rise, the loop deflector, under the influence of the operative portion 212 of the cam groove I51, moves toward the right causing said loop to be caught by the hook portion 21I of the loop deflecforming mechanism including a needle, cooperating loop handling elements, means for reciproeating said needle longitudinally; means for vibrating said needle laterally to cause the same to pass alternately through different holes in a button in the formation of attaching stitches and having provision for thereafter causing said needle to pass twice through the same hole to form a tying stitch, and means for operating said loop handling elements and having provision for causing different operations of said elements during the formation of attaching stitches and tying stitches respectively. z

2. In a machine for sewing on buttons, stitch 75 forming mechanism including a needle, cooperneedle, means for moving said loop handling elements transversely of the needle to cooperate therewith in the formation of attaching stitches and tying stitches, and means for moving said loop spreader relative to said looper to spread the loop, said last named means having a different operation in the formation of attaching stitches and tying stitches, respectively.

3. Ina machine for sewing on buttons, stitchforming mechanism including a needle, means for reciprocating the same,a looper carrier, loopers and loop spreaders carried thereby, means for oscillating said looper carrier in a path transverse to the path of movement of said needle to cause said loopers to cooperate with said needle in the formation of attaching stitches and tying stitches, said oscillating means being adapted to produce a greater amplitude of movement in the formation of attaching stitches than in the formation of tying stitches, a spreader actuator for moving said loop spreaders relative to said loop- 4. In a machine for sewing on buttons, stitchforming mechanism including a needle, means for reciprocating the same longitudinally, means for vibrating it laterally to cause it to pass alternately through different holes in the button in the formation of attaching stitches and having provision for thereafter causing it to pass twice through the same hole to form a tying stitch, loop handling elements, and means for operating said elements to cause the same to present thread loops for the passage of the needle therethrough alternately in different positions in the formation of attaching stitches and for holding a previously formed loop in the path of movement of the needie when the latter passes a second time through the same hole in the formation of the tying stitch.

5. In a machine for sewing on buttons, stitchforming mechanism including a needle, means for reciprocating the same longitudinally, means for vibrating it laterally to cause it to pass alternately through different holes in the button in the formation of attaching stitches and having provision for thereafter causing it to pass twice through the same hole to form a tying stitch,

looper elements, means for operating said ele-' ments to cause the same to present thread loops for the passage of the needle therethrough alternately in different positions in the formation of attaching stitches, a loop deflector, and means for operating the same to hold a previously formed loop in the path of movement of the needle when the latter passes a second time through the same hole in the formation of the tying stitch.

6. In a machine for sewing on buttons, in combination, stitch-forming elements and a cooperating .thread handling device, means for operating said stitch-forming elements toform a group of attaching stitches and means for operating said thread handling device to cause the latter to cooperate with said stitch-forming elements to form a tying stitch at the completion of said attaching stitches.

7. In a machine for sewing on buttons, a needle, cooperating loop handling means including a pair of loopers, means for causing said needle to pass alternately through different holes in a buta group of attaching stitchea and thereafter to cause one of said loopers to cooperate with said needle during its passage twice through the same hole to form a tying stitch.

, 8. In a machine for sewing on buttons, a needle,.cooperating loop handling means including apair of loopers each having associated therewith a coacting loop spreader, means for causing said needle to pass alternately through different holes in a button and thereafter to pass twice through the same hole, and means for causing the respective loopers and loop spreaders to cooperate alternately with the needle in its alternate passage through diiferent holes to form a. group of attaching stitches and thereafter to cause one of said loopers and its coacting lo'op spreader to cooperate with said needle during its passage twice through the same hole to form a tying stitch.

9. In a machine for sewing on buttons, a needle, cooperating looper means, means for causing said needle to pass alternately through different holes in a button and thereafter to pass twice through the same hole, and means for oscillating said looper means through a given range to cooperate with the needle in its alternate passage through different holes to form a group of attaching.

stitches and thereafter through a different range to cooperate with said needle during its passage twice through the same hole to form a tying stitch.

' 10. In a machine for sewing on buttons, a needle, cooperating loop handling elements, mechanism for operating said needle and loop handling elements to cause the latter to cooperate with the former in the formation of a predetermined number of attaching stitches, and

other means for thereafter cooperating with the needle and loop handling elements in the formation of a tying stitch.

11. In a machine for sewing on buttons, a

needle, cooperatng loop handling elements, mechanisn'i for operating said needle and'loop handling elements to cause the latter to cooperate with the former in the formation of a predetermined number of attaching stitches, and a loop deflector for thereafter cooperating with the needle and loop handling elements in the formation of a tying stitch.

12. A machine for sewing on buttons, stitch .forming mechanism including a needle and cooperating loop handling elements comprising a looper and a loop spreader, means for operating ,said elements to cause the same to cooperate with the needle in the formation of attaching stitches, a spreader actuator, a loop deflector, and means for actuating said spreader actuator and loop deflector in the formation 01' a tying stitch.

13. A machine for sewing on buttons, stitch forming mechanism including a needle and cooperating loop handling elements comprising a l ooper and a loop spreader, means for operating said elements to cause the same to cooperate with the needle in the formation of attaching stitches, a spreader actuator, a loop deflector, and com- ''mon means for actuatingv said spreader actuator and loop deflector in the formation of a tying stitch.

14. In a machine for sewing on buttons, stitch forming mechanism including a needle, means for reciprocating the same longitudinally, means for vibrating it laterally to cause it to pass alernately through different holes in the button for the formation of attaching stitches and having provision for thereafter causing it to pass twice through the same hole to form a tying stitch, a looper carrier, loopers and loop spreaders carried thereby, means for oscillating said looper carrier in a path transverse to the path of movement of said needle to cause said loopers to cooperate with said needle in the formation of attaching stitches and tying stitches, a-spreader actuator for moving said loop spreaders relative to said loopers to spread the loops, a loop deflector, and means for moving said spreader actuator relative to said carrier and for operating said loop deflector in the formation of tying stitches.

15. In a. machine for sewing on buttons, in

combination, stitch-forming elements including a needle and cooperating loop handling means, an additional thread handling device, means'for operating said stitch-forming elements to form a group of attaching stitches, and means for operating said thread handling device to cause the latter to cooperate with said stitch-forming elements to form a tying stitch at the completion of said attaching stitches. 1

' JOSEPH H. PIKUL. 

